menu

0th

Percentile

Menu Interaction Function

menu presents the user with a menu of choices labelled from 1 to the number of choices. To exit without choosing an item one can select 0.

Keywords
utilities, programming
Usage
menu(choices, graphics = FALSE, title = NULL)
Arguments
choices
a character vector of choices
graphics
a logical indicating whether a graphics menu should be used if available.
title
a character string to be used as the title of the menu. NULL is also accepted.
Details

If graphics = TRUE and a windowing system is available (Windows, OS X or X11 via Tcl/Tk) a listbox widget is used, otherwise a text menu. It is an error to use menu in a non-interactive session.

Ten or fewer items will be displayed in a single column, more in multiple columns if possible within the current display width.

No title is displayed if title is NULL or "".

Value

  • The number corresponding to the selected item, or 0 if no choice was made.

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

See Also

select.list, which is used to implement the graphical menu, and allows multiple selections.

Aliases
  • menu
Examples
library(utils) switch(menu(c("List letters", "List LETTERS")) + 1, cat("Nothing done\n"), letters, LETTERS)
Documentation reproduced from package utils, version 3.3, License: Part of R 3.3

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